Properties of the Number 99809

Ninety-Nine Thousand Eight Hundred Nine

Basics

Value: 99808 → 99809 → 99810

Parity: odd

Prime: Yes

Previous Prime: 99793

Next Prime: 99817

Digit Sum: 35

Digital Root: 8

Palindrome: No

Factorization: 99809

Divisors: 1, 99809

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11000010111100001

Octal: 302741

Duodecimal: 49915

Hexadecimal: 185e1

Square: 9961836481

Square Root: 315.92562415859845

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Primes that become squares when prefixed with a 1. A167734

Primes having only {0, 8, 9} as digits. A385772

Primes p such that 32p+1 and (p-1)/32 are both prime. A86476

Let a,b be prime numbers satisfying the Diophantine equation a³+b³=(a+b)*(a²-a·b+b²)=c². Then the second factor a²-a·b+b² is 3·e² for some integer e. This sequence tabulates the 'e' values, sorted by magnitude of c. A99809

Squares n² that become prime after omitting all ones in their decimal expansion. A175983